单项选择题
A.will always cause a vessel to capsize
B.should always be immediately corrected
C.always results from off-center weights
D.All of the above are correct
单项选择题 A minor heat burn of the eye should be treated by（）.
单项选择题 A mechanical davit is designed to automatically（）.
单项选择题 A helicopter making a round trip from a helideck with refueling capabilities to an unmanned platform will take 45 minutes each way. The helicopter should be carrying enough fuel to last（）.